libev/ev%2B%2B.h

/*
 * libev simple C++ wrapper classes
 *
 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, are permitted provided that the following conditions are met:
 * 
 *   1.  Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 * 
 *   2.  Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License ("GPL") version 2 or any later version,
 * in which case the provisions of the GPL are applicable instead of
 * the above. If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the BSD license, indicate your decision
 * by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL. If you do not delete the
 * provisions above, a recipient may use your version of this file under
 * either the BSD or the GPL.
 */

#ifndef EVPP_H__
#define EVPP_H__

#ifdef EV_H
# include EV_H
#else
# include "ev.h"
#endif

#ifndef EV_USE_STDEXCEPT
# define EV_USE_STDEXCEPT 1
#endif

#if EV_USE_STDEXCEPT
# include <stdexcept>
#endif

namespace ev {

  typedef ev_tstamp tstamp;

  enum {
    UNDEF    = EV_UNDEF,
    NONE     = EV_NONE,
    READ     = EV_READ,
    WRITE    = EV_WRITE,
    TIMEOUT  = EV_TIMEOUT,
    PERIODIC = EV_PERIODIC,
    SIGNAL   = EV_SIGNAL,
    CHILD    = EV_CHILD,
    STAT     = EV_STAT,
    IDLE     = EV_IDLE,
    CHECK    = EV_CHECK,
    PREPARE  = EV_PREPARE,
    FORK     = EV_FORK,
    EMBED    = EV_EMBED,
    ERROR    = EV_ERROR,
  };

  enum
  {
    AUTO = EVFLAG_AUTO,
    NOENV = EVFLAG_NOENV,
    FORKCHECK = EVFLAG_FORKCHECK,
    SELECT = EVBACKEND_SELECT,
    POLL = EVBACKEND_POLL,
    EPOLL = EVBACKEND_EPOLL,
    KQUEUE = EVBACKEND_KQUEUE,
    DEVPOLL = EVBACKEND_DEVPOLL,
    PORT = EVBACKEND_PORT
  };

  enum
  {
    NONBLOCK = EVLOOP_NONBLOCK,
    ONESHOT = EVLOOP_ONESHOT
  };

  enum how_t
  {
    ONE = EVUNLOOP_ONE,
    ALL = EVUNLOOP_ALL
  };

  struct bad_loop
#if EV_USE_STDEXCEPT
  : std::runtime_error
#endif
  {
#if EV_USE_STDEXCEPT
    bad_loop ()
    : std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
    {
    }
#endif
  };

#ifdef EV_AX
#  undef EV_AX
#endif

#ifdef EV_AX_
#  undef EV_AX_
#endif

#if EV_MULTIPLICITY
#  define EV_AX  raw_loop
#  define EV_AX_ raw_loop,
#else
#  define EV_AX
#  define EV_AX_
#endif

  struct loop_ref
  {
    loop_ref (EV_P) throw ()
#if EV_MULTIPLICITY
    : EV_AX (EV_A)
#endif
    {
    }

    bool operator == (const loop_ref &other) const throw ()
    {
#if EV_MULTIPLICITY
      return EV_AX == other.EV_AX;
#else
      return true;
#endif
    }

    bool operator != (const loop_ref &other) const throw ()
    {
#if EV_MULTIPLICITY
      return ! (*this == other);
#else
      return false;
#endif
    }

#if EV_MULTIPLICITY
    bool operator == (struct ev_loop *other) const throw ()
    {
      return this->EV_AX == other;
    }

    bool operator != (struct ev_loop *other) const throw ()
    {
      return ! (*this == other);
    }

    bool operator == (const struct ev_loop *other) const throw ()
    {
      return this->EV_AX == other;
    }

    bool operator != (const struct ev_loop *other) const throw ()
    {
      return (*this == other);
    }

    operator struct ev_loop * () const throw ()
    {
      return EV_AX;
    }

    operator const struct ev_loop * () const throw ()
    {
      return EV_AX;
    }

    bool is_default () const throw ()
    {
      return EV_AX == ev_default_loop (0);
    }
#endif

    void loop (int flags = 0)
    {
      ev_loop (EV_AX_ flags);
    }

    void unloop (how_t how = ONE) throw ()
    {
      ev_unloop (EV_AX_ how);
    }

    void post_fork () throw ()
    {
#if EV_MULTIPLICITY
      ev_loop_fork (EV_AX);
#else
      ev_default_fork ();
#endif
    }

    unsigned int count () const throw ()
    {
      return ev_loop_count (EV_AX);
    }

    unsigned int backend () const throw ()
    {
      return ev_backend (EV_AX);
    }

    tstamp now () const throw ()
    {
      return ev_now (EV_AX);
    }

    void ref () throw ()
    {
      ev_ref (EV_AX);
    }

    void unref () throw ()
    {
      ev_unref (EV_AX);
    }

    void set_io_collect_interval (tstamp interval) throw ()
    {
      ev_set_io_collect_interval (EV_AX_ interval);
    }

    void set_timeout_collect_interval (tstamp interval) throw ()
    {
      ev_set_timeout_collect_interval (EV_AX_ interval);
    }

    // function callback
    void once (int fd, int events, tstamp timeout, void (*cb)(int, void *), void* arg = 0) throw ()
    {
      ev_once (EV_AX_ fd, events, timeout, cb, arg);
    }

    // method callback
    template<class K, void (K::*method)(int)>
    void once (int fd, int events, tstamp timeout, K *object) throw ()
    {
      once (fd, events, timeout, method_thunk<K, method>, object);
    }

    template<class K, void (K::*method)(int)>
    static void method_thunk (int revents, void* arg)
    {
      K *obj = static_cast<K *>(arg);
      (obj->*method) (revents);
    }

    // const method callback
    template<class K, void (K::*method)(int) const>
    void once (int fd, int events, tstamp timeout, const K *object) throw ()
    {
      once (fd, events, timeout, const_method_thunk<K, method>, object);
    }

    template<class K, void (K::*method)(int) const>
    static void const_method_thunk (int revents, void* arg)
    {
      K *obj = static_cast<K *>(arg);
      (obj->*method) (revents);
    }

    // simple method callback
    template<class K, void (K::*method)()>
    void once (int fd, int events, tstamp timeout, K *object) throw ()
    {
      once (fd, events, timeout, method_noargs_thunk<K, method>, object);
    }

    template<class K, void (K::*method)()>
    static void method_noargs_thunk (int revents, void* arg)
    {
      K *obj = static_cast<K *>(arg);
      (obj->*method) ();
    }

    // simpler function callback
    template<void (*cb)(int)>
    void once (int fd, int events, tstamp timeout) throw ()
    {
      once (fd, events, timeout, simpler_func_thunk<cb>);
    }

    template<void (*cb)(int)>
    static void simpler_func_thunk (int revents, void* arg)
    {
      (*cb) (revents);
    }

    // simplest function callback
    template<void (*cb)()>
    void once (int fd, int events, tstamp timeout) throw ()
    {
      once (fd, events, timeout, simplest_func_thunk<cb>);
    }

    template<void (*cb)()>
    static void simplest_func_thunk (int revents, void* arg)
    {
      (*cb) ();
    }

    void feed_fd_event (int fd, int revents) throw ()
    {
      ev_feed_fd_event (EV_AX_ fd, revents);
    }

    void feed_signal_event (int signum) throw ()
    {
      ev_feed_signal_event (EV_AX_ signum);
    }

#if EV_MULTIPLICITY
    struct ev_loop* EV_AX;
#endif

  };

#if EV_MULTIPLICITY
  struct dynamic_loop : loop_ref
  {

    dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
    : loop_ref (ev_loop_new (flags))
    {
      if (!EV_AX)
        throw bad_loop ();
    }

    ~dynamic_loop () throw ()
    {
      ev_loop_destroy (EV_AX);
      EV_AX = 0;
    }

  private:

    dynamic_loop (const dynamic_loop &);

    dynamic_loop & operator= (const dynamic_loop &);

  };
#endif

  struct default_loop : loop_ref
  {
    default_loop (unsigned int flags = AUTO) throw (bad_loop)
#if EV_MULTIPLICITY
    : loop_ref (ev_default_loop (flags))
#endif
    {
      if (
#if EV_MULTIPLICITY
          !EV_AX
#else
          !ev_default_loop (flags)
#endif
      )
        throw bad_loop ();
    }

    ~default_loop () throw ()
    {
      ev_default_destroy ();
    }

  private:
    default_loop (const default_loop &);
    default_loop &operator = (const default_loop &);
  };

  inline loop_ref get_default_loop () throw ()
  {
#if EV_MULTIPLICITY
    return ev_default_loop (0);
#else
    return loop_ref ();
#endif
  }

#undef EV_AX
#undef EV_AX_

#undef EV_PX
#undef EV_PX_
#if EV_MULTIPLICITY
#  define EV_PX  loop_ref EV_A
#  define EV_PX_ loop_ref EV_A_
#else
#  define EV_PX
#  define EV_PX_
#endif

  template<class ev_watcher, class watcher>
  struct base : ev_watcher
  {
    #if EV_MULTIPLICITY
      EV_PX;

      void set (EV_PX) throw ()
      {
        this->EV_A = EV_A;
      }
    #endif

    base (EV_PX) throw ()
    #if EV_MULTIPLICITY
      : EV_A (EV_A)
    #endif
    {
      ev_init (this, 0);
    }

    void set_ (void *data, void (*cb)(EV_P_ ev_watcher *w, int revents)) throw ()
    {
      this->data = data;
      ev_set_cb (static_cast<ev_watcher *>(this), cb);
    }

    // method callback
    template<class K, void (K::*method)(watcher &w, int)>
    void set (K *object) throw ()
    {
      set_ (object, method_thunk<K, method>);
    }

    template<class K, void (K::*method)(watcher &w, int)>
    static void method_thunk (EV_P_ ev_watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (obj->*method) (*static_cast<watcher *>(w), revents);
    }

    // const method callback
    template<class K, void (K::*method)(watcher &w, int) const>
    void set (const K *object) throw ()
    {
      set_ (object, const_method_thunk<K, method>);
    }

    template<class K, void (K::*method)(watcher &w, int) const>
    static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (static_cast<K *>(w->data)->*method) (*static_cast<watcher *>(w), revents);
    }

    // function callback
    template<void (*function)(watcher &w, int)>
    void set (void *data = 0) throw ()
    {
      set_ (data, function_thunk<function>);
    }

    template<void (*function)(watcher &w, int)>
    static void function_thunk (EV_P_ ev_watcher *w, int revents)
    {
      function (*static_cast<watcher *>(w), revents);
    }

    // simple callback
    template<class K, void (K::*method)()>
    void set (K *object) throw ()
    {
      set_ (object, method_noargs_thunk<K, method>);
    }

    template<class K, void (K::*method)()>
    static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
    {
      K *obj = static_cast<K *>(w->data);
      (obj->*method) ();
    }

    void operator ()(int events = EV_UNDEF)
    {
      return ev_cb (static_cast<ev_watcher *>(this))
        (static_cast<ev_watcher *>(this), events);
    }

    bool is_active () const throw ()
    {
      return ev_is_active (static_cast<const ev_watcher *>(this));
    }

    bool is_pending () const throw ()
    {
      return ev_is_pending (static_cast<const ev_watcher *>(this));
    }

    void feed_event (int revents) throw ()
    {
      ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
    }
  };

  inline tstamp now () throw ()
  {
    return ev_time ();
  }

  inline void delay (tstamp interval) throw ()
  {
    ev_sleep (interval);
  }

  inline int version_major () throw ()
  {
    return ev_version_major ();
  }

  inline int version_minor () throw ()
  {
    return ev_version_minor ();
  }

  inline unsigned int supported_backends () throw ()
  {
    return ev_supported_backends ();
  }

  inline unsigned int recommended_backends () throw ()
  {
    return ev_recommended_backends ();
  }

  inline unsigned int embeddable_backends () throw ()
  {
    return ev_embeddable_backends ();
  }

  inline void set_allocator (void *(*cb)(void *ptr, long size)) throw ()
  {
    ev_set_allocator (cb);
  }

  inline void set_syserr_cb (void (*cb)(const char *msg)) throw ()
  {
    ev_set_syserr_cb (cb);
  }

  #if EV_MULTIPLICITY
    #define EV_CONSTRUCT(cppstem,cstem)                                                 \
      (EV_PX = get_default_loop ()) throw ()                                         \
        : base<ev_ ## cstem, cppstem> (EV_A)                                            \
      {                                                                                 \
      }
  #else
    #define EV_CONSTRUCT(cppstem,cstem)                                                 \
      () throw ()                                                                    \
      {                                                                                 \
      }
  #endif

  /* using a template here would require quite a bit more lines,
   * so a macro solution was chosen */
  #define EV_BEGIN_WATCHER(cppstem,cstem)                                               \
                                                                                        \
  struct cppstem : base<ev_ ## cstem, cppstem>                                          \
  {                                                                                     \
    void start () throw ()                                                           \
    {                                                                                   \
      ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this));                 \
    }                                                                                   \
                                                                                        \
    void stop () throw ()                                                            \
    {                                                                                   \
      ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this));                  \
    }                                                                                   \
                                                                                        \
    cppstem EV_CONSTRUCT(cppstem,cstem)                                                 \
                                                                                        \
    ~cppstem () throw ()                                                             \
    {                                                                                   \
      stop ();                                                                          \
    }                                                                                   \
                                                                                        \
    using base<ev_ ## cstem, cppstem>::set;                                             \
                                                                                        \
  private:                                                                              \
                                                                                        \
    cppstem (const cppstem &o);                                                         \
                                                                                        \
    cppstem & operator =(const cppstem &o);                                             \
                                                                                        \
  public:

  #define EV_END_WATCHER(cppstem,cstem)                                                 \
  };

  EV_BEGIN_WATCHER (io, io)
    void set (int fd, int events) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_io_set (static_cast<ev_io *>(this), fd, events);
      if (active) start ();
    }

    void set (int events) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_io_set (static_cast<ev_io *>(this), fd, events);
      if (active) start ();
    }

    void start (int fd, int events) throw ()
    {
      set (fd, events);
      start ();
    }
  EV_END_WATCHER (io, io)

  EV_BEGIN_WATCHER (timer, timer)
    void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
      if (active) start ();
    }

    void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
    {
      set (after, repeat);
      start ();
    }

    void again () throw ()
    {
      ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
    }
  EV_END_WATCHER (timer, timer)

  #if EV_PERIODIC_ENABLE
  EV_BEGIN_WATCHER (periodic, periodic)
    void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
      if (active) start ();
    }

    void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
    {
      set (at, interval);
      start ();
    }

    void again () throw ()
    {
      ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
    }
  EV_END_WATCHER (periodic, periodic)
  #endif

  EV_BEGIN_WATCHER (sig, signal)
    void set (int signum) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_signal_set (static_cast<ev_signal *>(this), signum);
      if (active) start ();
    }

    void start (int signum) throw ()
    {
      set (signum);
      start ();
    }
  EV_END_WATCHER (sig, signal)

  EV_BEGIN_WATCHER (child, child)
    void set (int pid, int trace = 0) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_child_set (static_cast<ev_child *>(this), pid, trace);
      if (active) start ();
    }

    void start (int pid, int trace = 0) throw ()
    {
      set (pid, trace);
      start ();
    }
  EV_END_WATCHER (child, child)

  #if EV_STAT_ENABLE
  EV_BEGIN_WATCHER (stat, stat)
    void set (const char *path, ev_tstamp interval = 0.) throw ()
    {
      int active = is_active ();
      if (active) stop ();
      ev_stat_set (static_cast<ev_stat *>(this), path, interval);
      if (active) start ();
    }

    void start (const char *path, ev_tstamp interval = 0.) throw ()
    {
      stop ();
      set (path, interval);
      start ();
    }

    void update () throw ()
    {
      ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
    }
  EV_END_WATCHER (stat, stat)
  #endif

  EV_BEGIN_WATCHER (idle, idle)
    void set () throw () { }
  EV_END_WATCHER (idle, idle)

  EV_BEGIN_WATCHER (prepare, prepare)
    void set () throw () { }
  EV_END_WATCHER (prepare, prepare)

  EV_BEGIN_WATCHER (check, check)
    void set () throw () { }
  EV_END_WATCHER (check, check)

  #if EV_EMBED_ENABLE
  EV_BEGIN_WATCHER (embed, embed)
    void start (struct ev_loop *embedded_loop) throw ()
    {
      stop ();
      ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
      start ();
    }

    void sweep ()
    {
      ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
    }
  EV_END_WATCHER (embed, embed)
  #endif

  #if EV_FORK_ENABLE
  EV_BEGIN_WATCHER (fork, fork)
    void set () throw () { }
  EV_END_WATCHER (fork, fork)
  #endif

  #undef EV_PX
  #undef EV_PX_
  #undef EV_CONSTRUCT
  #undef EV_BEGIN_WATCHER
  #undef EV_END_WATCHER
}

#endif

Revision:	1.38
Committed:	Mon Jan 28 11:43:37 2008 UTC (16 years, 3 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-3_2, rel-3_1, rel-3_0
Changes since 1.37:	+0 -3 lines
Log Message:	* empty log message *
#	Content
1	/*
2	* libev simple C++ wrapper classes
3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.
6	*
7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:
9	*
10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.
12	*
13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.
16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26	* OF THE POSSIBILITY OF SUCH DAMAGE.
27	*
28	* Alternatively, the contents of this file may be used under the terms of
29	* the GNU General Public License ("GPL") version 2 or any later version,
30	* in which case the provisions of the GPL are applicable instead of
31	* the above. If you wish to allow the use of your version of this file
32	* only under the terms of the GPL and not to allow others to use your
33	* version of this file under the BSD license, indicate your decision
34	* by deleting the provisions above and replace them with the notice
35	* and other provisions required by the GPL. If you do not delete the
36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.
38	*/
39
40	#ifndef EVPP_H__
41	#define EVPP_H__
42
43	#ifdef EV_H
44	# include EV_H
45	#else
46	# include "ev.h"
47	#endif
48
49	#ifndef EV_USE_STDEXCEPT
50	# define EV_USE_STDEXCEPT 1
51	#endif
52
53	#if EV_USE_STDEXCEPT
54	# include <stdexcept>
55	#endif
56
57	namespace ev {
58
59	typedef ev_tstamp tstamp;
60
61	enum {
62	UNDEF = EV_UNDEF,
63	NONE = EV_NONE,
64	READ = EV_READ,
65	WRITE = EV_WRITE,
66	TIMEOUT = EV_TIMEOUT,
67	PERIODIC = EV_PERIODIC,
68	SIGNAL = EV_SIGNAL,
69	CHILD = EV_CHILD,
70	STAT = EV_STAT,
71	IDLE = EV_IDLE,
72	CHECK = EV_CHECK,
73	PREPARE = EV_PREPARE,
74	FORK = EV_FORK,
75	EMBED = EV_EMBED,
76	ERROR = EV_ERROR,
77	};
78
79	enum
80	{
81	AUTO = EVFLAG_AUTO,
82	NOENV = EVFLAG_NOENV,
83	FORKCHECK = EVFLAG_FORKCHECK,
84	SELECT = EVBACKEND_SELECT,
85	POLL = EVBACKEND_POLL,
86	EPOLL = EVBACKEND_EPOLL,
87	KQUEUE = EVBACKEND_KQUEUE,
88	DEVPOLL = EVBACKEND_DEVPOLL,
89	PORT = EVBACKEND_PORT
90	};
91
92	enum
93	{
94	NONBLOCK = EVLOOP_NONBLOCK,
95	ONESHOT = EVLOOP_ONESHOT
96	};
97
98	enum how_t
99	{
100	ONE = EVUNLOOP_ONE,
101	ALL = EVUNLOOP_ALL
102	};
103
104	struct bad_loop
105	#if EV_USE_STDEXCEPT
106	: std::runtime_error
107	#endif
108	{
109	#if EV_USE_STDEXCEPT
110	bad_loop ()
111	: std::runtime_error ("libev event loop cannot be initialized, bad value of LIBEV_FLAGS?")
112	{
113	}
114	#endif
115	};
116
117	#ifdef EV_AX
118	# undef EV_AX
119	#endif
120
121	#ifdef EV_AX_
122	# undef EV_AX_
123	#endif
124
125	#if EV_MULTIPLICITY
126	# define EV_AX raw_loop
127	# define EV_AX_ raw_loop,
128	#else
129	# define EV_AX
130	# define EV_AX_
131	#endif
132
133	struct loop_ref
134	{
135	loop_ref (EV_P) throw ()
136	#if EV_MULTIPLICITY
137	: EV_AX (EV_A)
138	#endif
139	{
140	}
141
142	bool operator == (const loop_ref &other) const throw ()
143	{
144	#if EV_MULTIPLICITY
145	return EV_AX == other.EV_AX;
146	#else
147	return true;
148	#endif
149	}
150
151	bool operator != (const loop_ref &other) const throw ()
152	{
153	#if EV_MULTIPLICITY
154	return ! (*this == other);
155	#else
156	return false;
157	#endif
158	}
159
160	#if EV_MULTIPLICITY
161	bool operator == (struct ev_loop *other) const throw ()
162	{
163	return this->EV_AX == other;
164	}
165
166	bool operator != (struct ev_loop *other) const throw ()
167	{
168	return ! (*this == other);
169	}
170
171	bool operator == (const struct ev_loop *other) const throw ()
172	{
173	return this->EV_AX == other;
174	}
175
176	bool operator != (const struct ev_loop *other) const throw ()
177	{
178	return (*this == other);
179	}
180
181	operator struct ev_loop * () const throw ()
182	{
183	return EV_AX;
184	}
185
186	operator const struct ev_loop * () const throw ()
187	{
188	return EV_AX;
189	}
190
191	bool is_default () const throw ()
192	{
193	return EV_AX == ev_default_loop (0);
194	}
195	#endif
196
197	void loop (int flags = 0)
198	{
199	ev_loop (EV_AX_ flags);
200	}
201
202	void unloop (how_t how = ONE) throw ()
203	{
204	ev_unloop (EV_AX_ how);
205	}
206
207	void post_fork () throw ()
208	{
209	#if EV_MULTIPLICITY
210	ev_loop_fork (EV_AX);
211	#else
212	ev_default_fork ();
213	#endif
214	}
215
216	unsigned int count () const throw ()
217	{
218	return ev_loop_count (EV_AX);
219	}
220
221	unsigned int backend () const throw ()
222	{
223	return ev_backend (EV_AX);
224	}
225
226	tstamp now () const throw ()
227	{
228	return ev_now (EV_AX);
229	}
230
231	void ref () throw ()
232	{
233	ev_ref (EV_AX);
234	}
235
236	void unref () throw ()
237	{
238	ev_unref (EV_AX);
239	}
240
241	void set_io_collect_interval (tstamp interval) throw ()
242	{
243	ev_set_io_collect_interval (EV_AX_ interval);
244	}
245
246	void set_timeout_collect_interval (tstamp interval) throw ()
247	{
248	ev_set_timeout_collect_interval (EV_AX_ interval);
249	}
250
251	// function callback
252	void once (int fd, int events, tstamp timeout, void (cb)(int, void ), void* arg = 0) throw ()
253	{
254	ev_once (EV_AX_ fd, events, timeout, cb, arg);
255	}
256
257	// method callback
258	template<class K, void (K::*method)(int)>
259	void once (int fd, int events, tstamp timeout, K *object) throw ()
260	{
261	once (fd, events, timeout, method_thunk<K, method>, object);
262	}
263
264	template<class K, void (K::*method)(int)>
265	static void method_thunk (int revents, void* arg)
266	{
267	K obj = static_cast<K >(arg);
268	(obj->*method) (revents);
269	}
270
271	// const method callback
272	template<class K, void (K::*method)(int) const>
273	void once (int fd, int events, tstamp timeout, const K *object) throw ()
274	{
275	once (fd, events, timeout, const_method_thunk<K, method>, object);
276	}
277
278	template<class K, void (K::*method)(int) const>
279	static void const_method_thunk (int revents, void* arg)
280	{
281	K obj = static_cast<K >(arg);
282	(obj->*method) (revents);
283	}
284
285	// simple method callback
286	template<class K, void (K::*method)()>
287	void once (int fd, int events, tstamp timeout, K *object) throw ()
288	{
289	once (fd, events, timeout, method_noargs_thunk<K, method>, object);
290	}
291
292	template<class K, void (K::*method)()>
293	static void method_noargs_thunk (int revents, void* arg)
294	{
295	K obj = static_cast<K >(arg);
296	(obj->*method) ();
297	}
298
299	// simpler function callback
300	template<void (*cb)(int)>
301	void once (int fd, int events, tstamp timeout) throw ()
302	{
303	once (fd, events, timeout, simpler_func_thunk<cb>);
304	}
305
306	template<void (*cb)(int)>
307	static void simpler_func_thunk (int revents, void* arg)
308	{
309	(*cb) (revents);
310	}
311
312	// simplest function callback
313	template<void (*cb)()>
314	void once (int fd, int events, tstamp timeout) throw ()
315	{
316	once (fd, events, timeout, simplest_func_thunk<cb>);
317	}
318
319	template<void (*cb)()>
320	static void simplest_func_thunk (int revents, void* arg)
321	{
322	(*cb) ();
323	}
324
325	void feed_fd_event (int fd, int revents) throw ()
326	{
327	ev_feed_fd_event (EV_AX_ fd, revents);
328	}
329
330	void feed_signal_event (int signum) throw ()
331	{
332	ev_feed_signal_event (EV_AX_ signum);
333	}
334
335	#if EV_MULTIPLICITY
336	struct ev_loop* EV_AX;
337	#endif
338
339	};
340
341	#if EV_MULTIPLICITY
342	struct dynamic_loop : loop_ref
343	{
344
345	dynamic_loop (unsigned int flags = AUTO) throw (bad_loop)
346	: loop_ref (ev_loop_new (flags))
347	{
348	if (!EV_AX)
349	throw bad_loop ();
350	}
351
352	~dynamic_loop () throw ()
353	{
354	ev_loop_destroy (EV_AX);
355	EV_AX = 0;
356	}
357
358	private:
359
360	dynamic_loop (const dynamic_loop &);
361
362	dynamic_loop & operator= (const dynamic_loop &);
363
364	};
365	#endif
366
367	struct default_loop : loop_ref
368	{
369	default_loop (unsigned int flags = AUTO) throw (bad_loop)
370	#if EV_MULTIPLICITY
371	: loop_ref (ev_default_loop (flags))
372	#endif
373	{
374	if (
375	#if EV_MULTIPLICITY
376	!EV_AX
377	#else
378	!ev_default_loop (flags)
379	#endif
380	)
381	throw bad_loop ();
382	}
383
384	~default_loop () throw ()
385	{
386	ev_default_destroy ();
387	}
388
389	private:
390	default_loop (const default_loop &);
391	default_loop &operator = (const default_loop &);
392	};
393
394	inline loop_ref get_default_loop () throw ()
395	{
396	#if EV_MULTIPLICITY
397	return ev_default_loop (0);
398	#else
399	return loop_ref ();
400	#endif
401	}
402
403	#undef EV_AX
404	#undef EV_AX_
405
406	#undef EV_PX
407	#undef EV_PX_
408	#if EV_MULTIPLICITY
409	# define EV_PX loop_ref EV_A
410	# define EV_PX_ loop_ref EV_A_
411	#else
412	# define EV_PX
413	# define EV_PX_
414	#endif
415
416	template<class ev_watcher, class watcher>
417	struct base : ev_watcher
418	{
419	#if EV_MULTIPLICITY
420	EV_PX;
421
422	void set (EV_PX) throw ()
423	{
424	this->EV_A = EV_A;
425	}
426	#endif
427
428	base (EV_PX) throw ()
429	#if EV_MULTIPLICITY
430	: EV_A (EV_A)
431	#endif
432	{
433	ev_init (this, 0);
434	}
435
436	void set_ (void data, void (cb)(EV_P_ ev_watcher *w, int revents)) throw ()
437	{
438	this->data = data;
439	ev_set_cb (static_cast<ev_watcher *>(this), cb);
440	}
441
442	// method callback
443	template<class K, void (K::*method)(watcher &w, int)>
444	void set (K *object) throw ()
445	{
446	set_ (object, method_thunk<K, method>);
447	}
448
449	template<class K, void (K::*method)(watcher &w, int)>
450	static void method_thunk (EV_P_ ev_watcher *w, int revents)
451	{
452	K obj = static_cast<K >(w->data);
453	(obj->method) (static_cast<watcher *>(w), revents);
454	}
455
456	// const method callback
457	template<class K, void (K::*method)(watcher &w, int) const>
458	void set (const K *object) throw ()
459	{
460	set_ (object, const_method_thunk<K, method>);
461	}
462
463	template<class K, void (K::*method)(watcher &w, int) const>
464	static void const_method_thunk (EV_P_ ev_watcher *w, int revents)
465	{
466	K obj = static_cast<K >(w->data);
467	(static_cast<K >(w->data)->method) (static_cast<watcher >(w), revents);
468	}
469
470	// function callback
471	template<void (*function)(watcher &w, int)>
472	void set (void *data = 0) throw ()
473	{
474	set_ (data, function_thunk<function>);
475	}
476
477	template<void (*function)(watcher &w, int)>
478	static void function_thunk (EV_P_ ev_watcher *w, int revents)
479	{
480	function (static_cast<watcher >(w), revents);
481	}
482
483	// simple callback
484	template<class K, void (K::*method)()>
485	void set (K *object) throw ()
486	{
487	set_ (object, method_noargs_thunk<K, method>);
488	}
489
490	template<class K, void (K::*method)()>
491	static void method_noargs_thunk (EV_P_ ev_watcher *w, int revents)
492	{
493	K obj = static_cast<K >(w->data);
494	(obj->*method) ();
495	}
496
497	void operator ()(int events = EV_UNDEF)
498	{
499	return ev_cb (static_cast<ev_watcher *>(this))
500	(static_cast<ev_watcher *>(this), events);
501	}
502
503	bool is_active () const throw ()
504	{
505	return ev_is_active (static_cast<const ev_watcher *>(this));
506	}
507
508	bool is_pending () const throw ()
509	{
510	return ev_is_pending (static_cast<const ev_watcher *>(this));
511	}
512
513	void feed_event (int revents) throw ()
514	{
515	ev_feed_event (EV_A_ static_cast<const ev_watcher *>(this), revents);
516	}
517	};
518
519	inline tstamp now () throw ()
520	{
521	return ev_time ();
522	}
523
524	inline void delay (tstamp interval) throw ()
525	{
526	ev_sleep (interval);
527	}
528
529	inline int version_major () throw ()
530	{
531	return ev_version_major ();
532	}
533
534	inline int version_minor () throw ()
535	{
536	return ev_version_minor ();
537	}
538
539	inline unsigned int supported_backends () throw ()
540	{
541	return ev_supported_backends ();
542	}
543
544	inline unsigned int recommended_backends () throw ()
545	{
546	return ev_recommended_backends ();
547	}
548
549	inline unsigned int embeddable_backends () throw ()
550	{
551	return ev_embeddable_backends ();
552	}
553
554	inline void set_allocator (void (cb)(void *ptr, long size)) throw ()
555	{
556	ev_set_allocator (cb);
557	}
558
559	inline void set_syserr_cb (void (cb)(const char msg)) throw ()
560	{
561	ev_set_syserr_cb (cb);
562	}
563
564	#if EV_MULTIPLICITY
565	#define EV_CONSTRUCT(cppstem,cstem) \
566	(EV_PX = get_default_loop ()) throw () \
567	: base<ev_ ## cstem, cppstem> (EV_A) \
568	{ \
569	}
570	#else
571	#define EV_CONSTRUCT(cppstem,cstem) \
572	() throw () \
573	{ \
574	}
575	#endif
576
577	/* using a template here would require quite a bit more lines,
578	* so a macro solution was chosen */
579	#define EV_BEGIN_WATCHER(cppstem,cstem) \
580	\
581	struct cppstem : base<ev_ ## cstem, cppstem> \
582	{ \
583	void start () throw () \
584	{ \
585	ev_ ## cstem ## _start (EV_A_ static_cast<ev_ ## cstem *>(this)); \
586	} \
587	\
588	void stop () throw () \
589	{ \
590	ev_ ## cstem ## _stop (EV_A_ static_cast<ev_ ## cstem *>(this)); \
591	} \
592	\
593	cppstem EV_CONSTRUCT(cppstem,cstem) \
594	\
595	~cppstem () throw () \
596	{ \
597	stop (); \
598	} \
599	\
600	using base<ev_ ## cstem, cppstem>::set; \
601	\
602	private: \
603	\
604	cppstem (const cppstem &o); \
605	\
606	cppstem & operator =(const cppstem &o); \
607	\
608	public:
609
610	#define EV_END_WATCHER(cppstem,cstem) \
611	};
612
613	EV_BEGIN_WATCHER (io, io)
614	void set (int fd, int events) throw ()
615	{
616	int active = is_active ();
617	if (active) stop ();
618	ev_io_set (static_cast<ev_io *>(this), fd, events);
619	if (active) start ();
620	}
621
622	void set (int events) throw ()
623	{
624	int active = is_active ();
625	if (active) stop ();
626	ev_io_set (static_cast<ev_io *>(this), fd, events);
627	if (active) start ();
628	}
629
630	void start (int fd, int events) throw ()
631	{
632	set (fd, events);
633	start ();
634	}
635	EV_END_WATCHER (io, io)
636
637	EV_BEGIN_WATCHER (timer, timer)
638	void set (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
639	{
640	int active = is_active ();
641	if (active) stop ();
642	ev_timer_set (static_cast<ev_timer *>(this), after, repeat);
643	if (active) start ();
644	}
645
646	void start (ev_tstamp after, ev_tstamp repeat = 0.) throw ()
647	{
648	set (after, repeat);
649	start ();
650	}
651
652	void again () throw ()
653	{
654	ev_timer_again (EV_A_ static_cast<ev_timer *>(this));
655	}
656	EV_END_WATCHER (timer, timer)
657
658	#if EV_PERIODIC_ENABLE
659	EV_BEGIN_WATCHER (periodic, periodic)
660	void set (ev_tstamp at, ev_tstamp interval = 0.) throw ()
661	{
662	int active = is_active ();
663	if (active) stop ();
664	ev_periodic_set (static_cast<ev_periodic *>(this), at, interval, 0);
665	if (active) start ();
666	}
667
668	void start (ev_tstamp at, ev_tstamp interval = 0.) throw ()
669	{
670	set (at, interval);
671	start ();
672	}
673
674	void again () throw ()
675	{
676	ev_periodic_again (EV_A_ static_cast<ev_periodic *>(this));
677	}
678	EV_END_WATCHER (periodic, periodic)
679	#endif
680
681	EV_BEGIN_WATCHER (sig, signal)
682	void set (int signum) throw ()
683	{
684	int active = is_active ();
685	if (active) stop ();
686	ev_signal_set (static_cast<ev_signal *>(this), signum);
687	if (active) start ();
688	}
689
690	void start (int signum) throw ()
691	{
692	set (signum);
693	start ();
694	}
695	EV_END_WATCHER (sig, signal)
696
697	EV_BEGIN_WATCHER (child, child)
698	void set (int pid, int trace = 0) throw ()
699	{
700	int active = is_active ();
701	if (active) stop ();
702	ev_child_set (static_cast<ev_child *>(this), pid, trace);
703	if (active) start ();
704	}
705
706	void start (int pid, int trace = 0) throw ()
707	{
708	set (pid, trace);
709	start ();
710	}
711	EV_END_WATCHER (child, child)
712
713	#if EV_STAT_ENABLE
714	EV_BEGIN_WATCHER (stat, stat)
715	void set (const char *path, ev_tstamp interval = 0.) throw ()
716	{
717	int active = is_active ();
718	if (active) stop ();
719	ev_stat_set (static_cast<ev_stat *>(this), path, interval);
720	if (active) start ();
721	}
722
723	void start (const char *path, ev_tstamp interval = 0.) throw ()
724	{
725	stop ();
726	set (path, interval);
727	start ();
728	}
729
730	void update () throw ()
731	{
732	ev_stat_stat (EV_A_ static_cast<ev_stat *>(this));
733	}
734	EV_END_WATCHER (stat, stat)
735	#endif
736
737	EV_BEGIN_WATCHER (idle, idle)
738	void set () throw () { }
739	EV_END_WATCHER (idle, idle)
740
741	EV_BEGIN_WATCHER (prepare, prepare)
742	void set () throw () { }
743	EV_END_WATCHER (prepare, prepare)
744
745	EV_BEGIN_WATCHER (check, check)
746	void set () throw () { }
747	EV_END_WATCHER (check, check)
748
749	#if EV_EMBED_ENABLE
750	EV_BEGIN_WATCHER (embed, embed)
751	void start (struct ev_loop *embedded_loop) throw ()
752	{
753	stop ();
754	ev_embed_set (static_cast<ev_embed *>(this), embedded_loop);
755	start ();
756	}
757
758	void sweep ()
759	{
760	ev_embed_sweep (EV_A_ static_cast<ev_embed *>(this));
761	}
762	EV_END_WATCHER (embed, embed)
763	#endif
764
765	#if EV_FORK_ENABLE
766	EV_BEGIN_WATCHER (fork, fork)
767	void set () throw () { }
768	EV_END_WATCHER (fork, fork)
769	#endif
770
771	#undef EV_PX
772	#undef EV_PX_
773	#undef EV_CONSTRUCT
774	#undef EV_BEGIN_WATCHER
775	#undef EV_END_WATCHER
776	}
777
778	#endif
779